Xizzer Fizzbolt is an engineering vendor located in Everlook in Winterspring.
He sells the following recipes:
Schematic: Thorium Tube- Schematic: Delicate Arcanite Converter
- Schematic: Masterwork Target Dummy
- Schematic: Powerful Seaforium Charge
- Schematic: Gyrofreeze Ice Reflector
These recipes are limited in supply, so you have to wait until they are back "in stock" if someone bought them before you. (or just buy them from the Auction House)
In-game Picture
Location in Winterspring
He is inside the first building to the right after you walk through the entrance. (60.8, 38.4)
TomTom command:
/way Winterspring 60.8 38.4 Xizzer Fizzbolt
